JPH1158395A - Preparation of artificial wooden product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remarkably decrease working man-hour by a method wherein a cavity face is formed by arranging a cavity member at a specified position of one of molds and an ink displaying a conduit is applied on the projected part of the cavity member and the mold is closed by another mold and a resin for molding is molded. SOLUTION: Compressed air is fed from a hole on the back face of a cavity member 23 of a bottom mold to make the cavity member 23 deformed and only the projected part 23b brought into contact with the ink transfer face 30a of an ink transfer member. Then, a color 13a for a conduit is applied only on the projected part 23b. After the ink is applied on the projected part, the ink transfer member is retreated from the bottom mold and is held on a stamp base.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a pseudo-wood product, particularly a pseudo-wood product having a duct pattern.

[0002]

2. Description of the Related Art Conventional pseudo wood products include, for example, FIG.
To 3 shown in FIG. In this example, an outer frame (10) for an interior light of a house or the like is molded from a rigid foamed polyurethane raw material by using a mold reversely duplicated from a product model made of wood. 1 is a perspective view of the outer frame, FIG. 2 is a cross-sectional view of FIG. 1II, and FIG. 3 is a detailed view of a part II in FIG. In order to impart a more natural woody texture to the pseudo wood product thus obtained, a pipe color (dark) paint of wood (13)
The dark paint (13) is penetrated into the conduit recess (11) of the tree with the "dandelion" impregnated with the dandelion, and then the conduit recess (11) is cured before the paint is cured.
Excessive dark paint (1
3) Wipe off. Further, the dark paint in the conduit recess (11) is cured. Finally, the conduit color paint (13) is used to cover the dark portion (14) that has entered the fine voids unique to the polyurethane foam molded product, which remains even after wiping the paint adhered to surfaces other than the conduit portion. A lighter-colored wood-skin color paint (15) was applied to the entire surface of the molded product to obtain a product.

[0003]

As described above, in the conventional method for producing a pseudo-wood product, a step of applying a pipe color paint to a pipe recess after molding, a step of wiping the pipe color paint, and a step of curing the pipe color paint are performed. At least five post-processing steps including a drying step, a surface flesh-color coating step, and a curing-drying step of the flesh-color paint were required. Therefore, the number of work steps (time) per product is large and the production cost is very expensive. Also, from the viewpoint of quality, if the pipe color paint enters the pipe recess too much, the product will have a small difference in unevenness. However, there is a problem that natural wood texture is lost.

An object of the present invention is to provide a new method of manufacturing a pseudo-wood product which can greatly reduce the number of man-hours (time) under such circumstances.

[0005]

Means for Solving the Problems As a result of intensive studies, the present inventor has prepared in advance an elastic material in which the surface pattern of a natural wooden fabric is transferred and the conduit portion (recess) is copied as a convex portion. After arranging in the mold as a cavity member forming the inner surface of the cavity, it was found that it is effective to apply a conduit color ink to the convex portion corresponding to the conduit portion, and to introduce and mold a resin material. Invented the invention.

That is, according to the present invention, (1) a cavity member made of an elastic material to which a surface pattern of a natural wood cloth having fine irregularities due to a conduit or the like is transferred is arranged at a predetermined position of one of the molds. Forming a cavity surface, applying ink for indicating a conduit to the convex portion of the cavity member, closing the mold with the other mold, and molding a molding resin; 2) The application of ink to the convex portion of the cavity member is performed by disposing a conduit color ink transfer member through a clearance in opposition to the cavity member, and pressing the cavity member toward the ink transfer member. (3) The method for producing a pseudo-wood product according to (1), (3) the method for producing a pseudo-wood product according to (2), wherein the pressing of the cavity member is performed by fluid pressure from the back surface side of the cavity member. About.

[0007] As the elastic material used in the present invention, which functions as a cavity member obtained by copying the conduit portion as a convex portion, it is possible to transfer a texture such as a conduit portion on the surface of a natural wooden cloth and to the conduit portion. Although it is not particularly limited as long as it is a flexible elastic material that can apply the conduit color ink to the corresponding convex portion, silicone rubber is preferable. This silicone rubber is used as a rubber-like elastic body having a thickness of about 5 to 7 mm in which a monomer or prepolymer in a liquid state is applied to a natural wooden model, cured, and the surface pattern is copied. The silicone rubber is used as a cavity member so as to cover an inner surface of one mold having a predetermined shape, and a cavity surface is formed by the silicone rubber cavity member.

[0008] The conduit color (dark) ink is applied only to the convex portion corresponding to the conduit portion of the cavity member. This may be performed manually, but the ink is applied to only the convex portion reliably and efficiently. For this purpose, it is preferable to employ the following coating method.

That is, the cavity member is disposed at the cavity forming position of the mold without any gap so as to cover the cavity member. A plurality of holes are provided at appropriate positions on the mold cavity forming surface, and through this, the pressurized fluid is formed. For example, pressurized air can be supplied or exhausted. In order to apply the conduit color ink only to the convex portion of the cavity member, a slightly smaller conduit color ink transfer member corresponding to the mold cavity is separately prepared, and the conduit color ink is coated on the surface of the ink transfer member. Is applied. The application of the ink is preferably performed by a conduit color ink supply member made of a cushion material such as wool felt that has absorbed the conduit color ink, which is also referred to as a stamp base. Next, the conduit color ink transfer member (this is compared to the stamp base with respect to the stamp base) to which ink has been applied from the stamp base is placed in a mold-closed state facing the mold cavity in which the cavity member is arranged. Deploy. The conduit color ink transfer member is previously formed in a shape and size that can maintain the clearance over the entire surface of the cavity when the mold is closed with respect to the mold cavity. Thereafter, a pressurized fluid is introduced from a hole provided on the back surface of the cavity member, and the cavity member is floated to come into contact with the conduit color ink transfer member, and the ink is transferred only to the projection. The pressure of the pressurized fluid at this time depends on the properties of the elastic material constituting the cavity member, but is generally about 0.01.
The range is preferably from 0.05 to 0.05 kg / cm ² . If the pressure is too low, it is difficult to float the ink so that the ink is transferred to the projections of the cavity member, and if the pressure is too high, the ink is also transferred to portions other than the projections of the cavity member. Would. After the transfer, the pressurized fluid is exhausted from the hole, and in some cases, a reduced pressure state is applied from the hole to bring the cavity member into close contact with the inner surface (back surface) of the mold. Therefore, the actual inner surface of the cavity is formed by the cavity member.

Next, resin is introduced into the cavity.
The mold is closed by the other mold, and a molten resin colored with a flesh color (bright color) by injection molding is injected into the cavity. After the mold is opened, the surface of the obtained product is colored wood flesh color, and the fine concave channel portion (dark color) clearly appears therein, and has the same appearance as the natural wood surface. . The resin may be colored by in-mold coating or by spray coating after molding. Also, the molding method is not limited to the injection molding method, and other molding methods can be used as needed.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 4 is an explanatory view showing an example of a mold (for an outer frame of a room light) used in the present invention. In FIG. 4, reference numeral 21 denotes a lower mold, which is a cavity member 2 made of silicone rubber.
3 and cover the back surface of the cavity member 23 without any gap,
And a main mold (22) that is removably stored. The main mold is further provided with a plurality of holes (22a) through which pressurized air can be supplied from the outside of the mold to the back surface of the cavity member (23) and exhausted (reduced suction if necessary).

A molding die is constituted by the lower die (21) and the upper die (25) for forming the back surface of the product, and is attached to a molding machine (not shown). Also, FIG.
FIG. 4 is an enlarged explanatory view of a portion III in FIG. 4, showing a state in which a cavity member (23) is closely attached to a predetermined position of a lower mold to form a concave cavity surface (23a).
In addition, 23b is a convex part corresponding to the conduit part.

The cavity member (23) is prepared by preparing a product model from natural wood in advance and applying a silicone rubber to the surface of the cavity to harden the surface to copy a wooden pattern, and has a wall thickness of 5 to 7 mm. Has a concave shape.

FIGS. 6 to 14 are views for explaining a step of applying a conduit color ink to the convex portion (23b) corresponding to the conduit section of the cavity member, and FIGS. is there. FIG. 6 shows a case where the conduit color ink is applied to the convex portion (23).
FIG. 7 is a view for explaining means for supplying conduit color ink (13) to the ink transfer surface (30a) of the conduit color ink transfer member (30) for application to b). This conduit color ink is preferably of a type reactive with a molding resin material described later. In this embodiment, an ink reactive with the rigid foamed polyurethane resin material (40) is used. The ink transfer surface (30a) having a shape corresponding to the cavity surface (23a) is pressed against the ink-containing surface (31a) of the stamp table 31, which is an ink supply member made of felt or the like, so as to close the mold, thereby transferring the ink. The surface (30a) is coated with ink. In this way, the transfer member (30) is traced to the stamp stand (31) as a "seal."

FIG. 7 is an enlarged explanatory view of a part IV in FIG. 6 and shows the conduit color ink (1) on the ink-containing surface (31a) of the stamp stand.
3) is held. FIG. 8 is an explanatory view showing a state in which the conduit color ink transfer member (30) to which the ink has been applied is closed in the lower mold (21). In this case, as shown in FIG. 9, which is an enlarged explanatory view of a portion V in FIG.
0) is opposed to the cavity member 23 via a clearance. FIG. 10 is an enlarged explanatory view of a VI part in FIG.
The conduit color ink (13) is located at a position facing the convex portion (23b) of the cavity member 23.

FIGS. 11 to 14 are explanatory views of the step of applying the conduit color ink to the convex portion of the cavity member. FIG.
Pressurized air (0.01 to 0.05 kg / c) through the hole (22a) on the back surface of the cavity member (23) of the lower mold (21).
m ² ), the cavity member (23) is deformed, and only the protrusion (23b) is brought into contact with the ink transfer surface (30a) of the ink transfer member (30). FIG. 12 is an enlarged explanatory view of a part VII in FIG.
The protrusion (23b) is in contact with the ink (13).

FIG. 13 is a view for explaining a state in which the pressurized air is then exhausted and the cavity member 23 is returned to a reduced pressure state if necessary, and FIG. 14 is an enlarged explanatory view of a portion VIII in FIG. . The conduit color ink (13a) is applied only to the projections (23b). After applying ink to the convex part,
The ink transfer member (30) is retracted from the lower mold (21), held on the stamp table (31), and waits until the next cycle.

FIGS. 15 to 18 are explanatory views of the steps of closing the mold with the upper mold 25, and then injecting and molding a hard foamed polyurethane resin material (40) colored wood-colored into the cavity by a conventional method. . 15 illustrates a state where the mold is closed by the upper mold (25) and the hard foamed polyurethane resin material 40 is injected. FIG. 16 is an enlarged explanatory view of a portion IX in FIG. 15 and FIG. It is a further enlarged explanatory view of a part. FIG. 18 is an enlarged detailed explanatory view of the surface (10a) of the pseudo-wood product taken out after the mold is opened, and the conduit recess (11) is shown.
Only the conduit color ink (13) is contained therein, and the ink reacts with the rigid foamed polyurethane resin material of the molding material to be integrated. The other part is void (1
Including 4), all are made of a wood-colored resin material, and have the same appearance as the surface of a natural wooden cloth.

FIGS. 19 and 20 are diagrams for explaining another embodiment of the present invention. FIG. 19 shows that after the ink (13) is applied to the cavity member protrusion (23b) in the above embodiment,
This is for explaining the state in which the wood-color paint (15) is in-mold coated. Next, when the hard foamed polyurethane material is injected and molded, as shown in FIG. 20, the conduit color ink (1) is applied only to the conduit portion (11) as in the previous embodiment.
3) enters, and the other surface is colored with the in-mold coated wood-colored paint (15).

[0021]

As described above, according to the present invention,
Pseudo wood products can be obtained in the resin molding process without the need for complicated post-processing after molding, and the number of man-hours can be greatly reduced compared to conventional methods for manufacturing pseudo wood products, and production costs are also large. Can be reduced to Moreover, the obtained artificial wood product can accurately show the texture of the wood including the conduit portion on the surface of the natural wooden cloth, and the conduit portion forms a convex portion in the molding die. Even if the applied conduit color ink becomes thicker, it is possible to form a conduit having a predetermined depth as a product, and it is possible to maintain the natural wooden skin unevenness.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an example of a conventional artificial wood product, and is a perspective view of an outer frame for an interior light.

FIG. 2 is a sectional view taken along the line II of FIG. 1;

FIG. 3 is an enlarged detail view of FIG. 2II.

FIG. 4 is an explanatory view showing an example of a mold used in the present invention.

FIG. 5 is an enlarged detailed explanatory view of a portion III in FIG. 4;

FIG. 6 is a diagram showing a conduit color ink and a cavity member convex portion (23b).
FIG. 4 is a view for explaining means for supplying conduit color ink (13) to an ink transfer surface (30a) of a conduit color ink transfer member (30) for applying the ink to the ink.

FIG. 7 is an enlarged detailed explanatory view of an IV section in FIG. 6;

FIG. 8 shows a conduit color ink supply member (30) as a lower mold (21).
FIG.

FIG. 9 is an enlarged detailed explanatory view of a portion V in FIG. 8;

10 is an enlarged detailed explanatory diagram of a VI section in FIG. 9;

FIG. 11 is an explanatory view of a state in which a cavity member (23) is brought into contact with an ink transfer surface (30a) of an ink transfer member (30) by pressurized air.

FIG. 12 is an enlarged detailed explanatory view of a section VII in FIG. 11;

FIG. 13 is a diagram illustrating a state in which the cavity member (23) is returned to an original position.

FIG. 14 is an enlarged detailed explanatory view of a portion VIII in FIG. 13;

FIG. 15 is an explanatory view showing a state in which the upper mold (25) and the lower mold (21) are closed, and a hard foamed polyurethane resin material (40) is injected.

FIG. 16 is an enlarged detailed explanatory view of a portion IX in FIG.

FIG. 17 is an enlarged detailed explanatory view of a portion X in FIG. 16;

FIG. 18 is an enlarged detailed explanatory view of a formed pseudo wood product.

FIG. 19 is a view showing another embodiment, in which the ink (13) is applied to the convex portion (23b) of the cavity member and then the wood-colored paint (15) is in-mold coated.

FIG. 20 is an enlarged detailed explanatory view of a pseudo wood product according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Pseudo wood product 10a Pseudo wood product surface 11 Conduit recess 13 Conduit color ink 14 Fine void 15 Wood color paint 21 Lower mold 22 Main mold 22a Hole 23 Cavity member 23a Cavity surface 23b Convex portion 30 Conduit color ink transfer member 30a Ink transfer surface 31 Stamp Table 31a Ink-containing surface 40 Hard foamed polyurethane resin material

Claims (3)

[Claims] 1. A cavity member made of an elastic material to which a surface pattern of a natural wooden cloth having fine irregularities due to a conduit or the like is transferred is disposed at a predetermined position of one mold to form a cavity surface. What is claimed is: 1. A method for manufacturing a pseudo wood product, comprising applying ink for indicating a conduit to a convex portion of a cavity member, closing the mold with the other mold, and molding a molding resin. 2. A method of applying ink to the convex portion of the cavity member, wherein a conduit color ink transfer member is provided via a clearance in opposition to the cavity member, and the cavity member is pressed toward the ink transfer member. Claim 1
A method for producing the artificial wood product according to the above. 3. The method according to claim 2, wherein the pressing of the cavity member is performed by a fluid pressure from the back surface side of the cavity member.